Valveless pump.



G. J. DDURTE. VALVELESS PUMP.

' APPLICATION FILED 00T.23, 1911. 1 ,034,592. Patented Aug'. 6, 1912.

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` aumento@ Gl/Ui/tmzooao @@XQMQM G. J. DOURTE. VALVELESS PUMP.

APPLICATION FILED OCT. 23, 1911. 1,034,592. Patented Aug. 6, 1912.

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G. J. DOURTE. rVALvELEss PUMP.

' PPLIOATON FILED 00T. 23, 1911. I 1,034,592. Patented Aug. 6, 1912.

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.G. J. DURTE.

VALVELESS PUMP. l APPLICATION FILED 001223. 1911.

Patented Aug. 6, 1912.

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GEORGE DOURTE, 0F LONGMONT, COLORADO.

vALvELns's PUMP.

v Specification of Letters Patent.

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Application filed October 23, 1-911. Serial No. 656,144.

To all whom fitfmay concern:

Be it known that I, GEORGE J. Doun'rn, a citizen of the United States, residing at Longmont, in the county of Boulder and State of' Colorado, have invented certain new and useful Improvements in Valveless p Pumps7 of which the following is a specification, reference being had to the accompanying drawings.

This invention relates to pumps and more particularly to a valveless pump of the double 'acting reciprocating type, the invention having for its primary object the provision 'sides -in the provision of new of a very simple and compact arrangement of parts whereby the necessity of employing the usual check valve `is entirely eliminated.

A further object of the invention is to pro# vide means' whereby the interruption of the operation of the pump by foreign material which may be present in the fluid entering the pump `.cylinders is avoided.

Pnother object of the invention is to provide a compound cylinder pump having reversely reciprocating and oppositely r'otating pistons to automatically and alternately open and close the discharge and admission ports of the respective cylinders.

A still further object of the invention remeans' for forming an air-tight connection between the reciprocating pistons and the admission and discharge ports of the cylinders. y I

With the above and other objects in view, the invention consists of the novel features of construction, combination and arrangementtof parts hereinafter fully described4 and claimed, and illustrated in the accom- .panying drawings, in which- Figure 1l isl a side elevation of a double acting pump embodying my improvements;

'l Fig. 2 is a top plan view; Fig. 3 is an end view; Fig. 4 '1s' an enlarged vertical's'ection taken on the line of. Fig'. l; Fig. '5 is la section taken on the line 5-'5 of Fig. 4;;4 Fig'. 6' is a detail section taken on the line 6-6- of Fig. 4.; Figi 7 is a detail elevation of one ofthe saddlefplates; Fig. 8 is a detail `l section taken on the .line 8-- 8 of Figi 73;" Fig. 9 l'is a detail elevation ofthe" sectional1 .n gear wheel;- 'and Fig. 10 isa detail view part-ly in section of the connecting yoke" etw'een the crank shaft and piston"s., I

1n the accompanying drawings 1 have illustrated a pump'jotthe double acting" type `wlrerein the ders 5 YYare verticallyV disa'nd novelV posed and are rigidly secured at their lower ends upon a suitablebase 6. These cylinders have integrally formed upon their upper ends and ext-ending in opposite lateral directions therefrom, the horizontal bracket .plates 7 which. include the inclined braces 8 in the bearings 14 on the upper end of the standard 9. The gear 12 would preferably,

thou-gh not necessarily, be formed in two sections' as vshown in Fig. 9 of the drawings andsecnrely bolted together by means of the inner andeutet v'bolts 15 and '16 respectively whicli extend through openings in ianges 17 formed upon the abutting edges of the gear sections. By providing these gearsections the same may be easily and quickly removed from the crank shaft without necessitating the removal of said shaft, so that the speed of operation of the pump may be g.

chan-ged withoutu'ndue loss of time.

Upon the uplner end of the standard 9 `and on 'opposite si es of the bifurcation therein, the transversely disposed arms 18 are formed. These arms are provided with bca-rings 19V on their outer ends in which a;

countersliaft y29' is rotatably mounted. Upon ,this shaft between the bearings A19 a pinion 21 is keyed 'and said pinion meshes with the teeth of tlre gear 12 to transmit rotary movement' to the crank shaft. A band .wheeior pulley 22 which may be connected to any suitable source of power is fixed upon one end ol the countershaft 20.

in each oi the cylinders 5 -a 'vertically reciprocating" piston 23 is arranged, and

these pistons are of substantially the same iengtlt'as' :cylinders and are each pros' `viciedlat an intermediate point with an in- I ternal-head or wall 24. The lannular wallof each piston above' the head 24 has apertures it'ofrmed' therein at ldiametrically opposite points tol yreceive the ends of a wrist pin 25 and securing bolts 256 are longitudinally disposed in the piston walls and are conically formed at their lower-` ends for engagement in the similailyshaped'netches or seats 2'7 provided in thretenis cf the pin 25. The' upico..

4position .or permit of its removal.

per ends of the securing bolts 26 have threaded engagement in the wall of the piston as shown at 28 whereby they maybe readily adjusted to secure the wrist pin in Means are^empoyed to connect thc pistons to the crank shaft 13 whereby a combined reciprocatory and rotary movement is imparted to said pistons. This means is substantially identical vwith that disclosed in my prior application for patent liled March 14th, 1911, Serial No. 614,392, and includes a connecting rod 29, which at 'its lower end is formed with a yeke 3'() the arms of which are longitudinally split as clearly shown in Fig. t5 and in the inner ends of the split arms, bushings 3l are arranged. Upon the vwrist pin 25 a sleeve 32 is loosely arranged for rotary movement, and this sleeve 1s centrally provided at opposite points with the trunnions 33 which are rotatably disposed in the bushings The opposed portions of the split ends oi the yoke arms are connected by means of the clamping bolts 34 whereby the bushings 31 are rigidly clamped in position therebetween. By this construction it will be noted that a universal movement is obtained between the connecting rod and the piston 23. The upper end of the connecting rod is slightly reduced in diameter and provided with an annular flange 35. This reduced end of the connecting rod extends through a bushing 36 arranged between the arms of a yoke37. This yoke is loosely mounted upon the crank 13 on one end of the crank shaft 13, said shaft being' rotatable in a bushing 3S which is Ithe bolts 40.

rigidly held between the body portion andV the top or cap 39 of the yoke by means of The reduced end portion of the' connecting rod extends abovefthe bushing 36 between the arms of the yoke and has arranged thereon the miter gear 41. This gear is rigidly fixed upon the end of the connecting rod by means of a pin 42 which extends transversely through the rod and the tubular boss formed upon the gear. This gear meshes with a similar gear 43 which is splined or keyed upon the end of the crank shaft. By means ofthis connection it will be readily seen that when the crank sha-ft is rotated the yoke 37 will swing thereon so thatvt'he gear which is arranged between the yoke arms will move upon the toothed face of the complementary gear 43 on the crank shaft and. rotary movementas well as reciprocato'ry movement will'thus be imparted to the piston 23.

To each of the cylinders 5 upon one "ide ,thereof the discharge head or pipe 44 is .connected and to the walls of thev cylinders ati Y the opposite .side thereof the suction head or pipe 45 is connected. The means for forming these connections between the pipesl 44] and 45 and the cylinders constitutes a very important and essential part ofthe present invention as 1t is imperative that these connections be made perfectly airtight and that wear between the periphery of the reciprocating pistons and the cylinder walls be compensated for. l secure Vthe desired result by the provision of the saddle plates 46 which are arcuate in cross sectional form and are arranged within the cylinder, one pair of such plates being provided for each cylinder and arranged at opposite points in the wall thereof. Annular flanges t7 are integrally formed with the saddle plates and project from their convex faces. This flange extends,outwardly through the (.ipenings 48 iu the cylinder' wall. The inner peril-iheralface of the llange 47 is provided with. an annular shoulder 49 which is formed by reducing th, .thickness of the [lange and into this reduced outer end of the flange 47 the circumscribing inner edge portion of a packing ring 50 extends. This packing ring may be of any desired material suitable for the purpose and is rigidly held in 'the end of the flange by means of a metal ring 51 which is disposed upon the packing and is secured to the flange of the saddle plate by means of a plurality ofscrews 52 which extend through said metallic ring and the packing. The greater' portion of' the packing ring 50 is disposed upon the eXte rior of the cylinder wall around the opening l-S thereof and is securely held t-he'reagainst by means of the coupling ring 53 which is secured tothe wall of the cylinder by the bolts 54, suitable openings being 'provided in the packing ring for the reception of said bolts. The 'packing ring is also provided with additional openings which are in line with the openings 56 formed through the wall of the cylinder adjacent the edge of the opening 48 and at diametrieally opposite points with relation thereto. In these openings the coiled springs 57 are arranged and bear against the saddle plate 4 6 at their inner ends, the outer' ends of said springs engaging with the adjustable bolts 58. .By adjusting-these bolts the tension of the springs may be regulated in accordance with the degree of frictionwhich is necessary between the inner concave face vof the saddle plate and the periphery ofthe piston in order to form an air-tight connection. It will be` observed that the end of the flange 47 'on the saddleplate is' slight ly. spaced from the packing ring as indicated at 59 so as to permit of thellexing'pf said against the'wall of the opening 4S. In the wall of the hollow piston 23 below the intermediate he'ad plate 24 thereof.y an arcuate opening 60 is provided and this opening is adapted to register with the opening in vring at this pointasl t-he saddlefplate is forced inwardly. by'fthe springs 57. the' flange 47 'of saidsaddle plate moving freely j and discharge heads.

Loaaeea closely' against the Walls of the narrower portions of the cylinders and the inner con-V cave.faces ofthe saddle plates 46. lThe upper ends ofthe cylinders are also of increased internal diameter and have arranged ;l therein the adjustable collars 62 which are providedrwith the flanges 63 having openings therein for the reception of the bolts 64. These boltsa-re threaded into the upper ends of thecylinder walls and nuts 65 have threadedengagement on the upper ends of the bolts and eng-age with. the flanges of said collars to secure the same in their adjusted positions. Between the lower ends of 'follows the packing collars 62 and an annular shoulder 62 on the inner Wallof the piston cylinder, a packing. ring 67 of any suitable material is, arranged," and by adjusting the collar 62,-said ring may be at all times disposed inclose frictional engagement upon the pei,riphery of the pistonto prevent any leakage [of the Huid upon the downstroke thereof.

The operation' of my improved pump is as When? power is applied to the countershaft20',A rotary movement is transmitted to the" crank-shaft 13 and the pistons 23 are reciprocated'in reverse directionsin their respective cylinders. At the same time rotary movement is imparted to the 40! ""jing that the pistons are inthe positions pistons and. in relative opposite directions in the manner previously described. Assum-` v 'Lg/shown? im Fig;y 1, upon the down stroke of the raised' .4 downward movement.

"Flare entirely out of communication with: the

piston', the liuid will be discharged chamber 6l"of the cylinder, the opening in the wall of the piston immediately beginninggto aline-with the opening of the saddleyplate t6 at'the start of this` The opening in the wall of the other piston is progressively moved into full register with the admission of its-cylinder andthe Huid isbeing ad.

from the The pistons 23 moving in opposite directions in theeylinders, havetheir openingseO dis-v posed in complete alinement withl the openings'ot the saddle plates of the inlet vand discharge ports of. the; respective cylinder?, vvfhen said?` pistons have lcompleted f one-half e,piston;stroke", the openings 60"' thereof' i" openings in; the saddlefplates. Upon the jggimultaneOuSly reverse movements of the pistone, they are rotated in opposite direc.-

ltions and suction -is' created ',upon the` up,-

pistons from the power shaft.

their`v stroke.V and. upon the completion of stroke of one piston to draw the fluid into the cylinder, the opening in the wall of said piston gradually movingpast the opening in the saddle plate 46 both in a longitudinal and circumferentialdirection. "Ccmmunicationrbetween the interior of the other piston and the discharge port is also gradually cut ott until when the piston is at the lowest point of its stroke the positions of the open- -ings in the respectivepistons is reversed.

Thus it will be seen that upon each stroke of the pistonl it also makes one-half of a revolution. The rotation of the pistons is continuous and the dimensions yof the inlet and discharge openings to the piston cylin ders is properly proportioned in accordance with the" stroke of the pistons so that the admissionl and discharge of the fluid will be continuous. By providing the. rotary as well as reciprocating pistons, a very powerful suction is created as the openings in the Walls of the pistons pass the openings in the saddle plates.

Each ofthe cylinders is also provided with an opening in its wall at its lower end to which a drain pipe 66 is connected. These pipes preferably extend from opposite sides of the cylinders with respect to each other and drain the cylinders below the ad-4 mission and exhaust ports.

In cases where it is Vdesirable to pump i `liuids from one. point to another vand back again to theoriginal depository, such return of the fluid may be readily acco1nplished by simply reversing the application of power to the sha'ft 20 and interchanging the inlet and discharge pipe nozzles so that what was formerly .the discharge ports of the cylinders becomes the inlet ports and vice versa. f

It will be understod that while 'I have specified the pistons as turning or rotating in opposite directions within their respective cylinders, this opposite rotation of the pistons is no z essential to the utility'of the ap-` yparatus liu Ais the result of applicants specilic gearing for transmit-'ting power to the The pistons may both rotate in the same direction if-it is desirable to employ other power transmission means than that hereinbefore described. mitted1 to the chamber 61 of' said cylinder.

From the foregoing it is thought that theA construction and manner of operation of my improved pump will be fully understood. y the provision of theyieldingly held saddle plates' an absolutely air tight connection between the piston cylinders and the suction and discharge pipes is effected, the wear upon said plates being taken up by means of the springs '57' which at all times hold the concave faces'of said plates inclose engage- Inentwith the pistons. As the tension of these springs may bereadily regulated, the, proper amount of friction between the plates and-the peripheries of the pistons can:

be obtained. It will also be noted that my particular mounting of the various operating parts prvides a very compact arrangement so that the pump may be readily installed and operated in places of restricted dimensions. The action of the pump is also,

l. In a pump, a pair or cylinders each having an inletand discharge pipe connected thereto, hollow pistons to reciprocate in said cylinders each provided with a head and having an arcuate opening in its annular wall, an operating-shaft having a crank on each end, connections between said cranks and the pistons to reciprocate the pistons in reverse directions with respect to each other, co-acting means carried by the pistons and said cranks to continuously rotate the pistons in their reciprocatory movement and alternately 'register the openings in the piston walls with the inlet and discharge pipes of the respective cylinders.

2. In a pump, a pair of cylinders each having an inlet and discharge. pipe connected thereto, hollow pistons to reciprocate in ksaid cylinders each provided with an internal intermediate head and an arcuate opening in its annular wall at one side of the head, and means for reciprocating said pistons in reverse directions with respect to i each other and continuously rotating the pistons in opposite direct-ions with respect to each other whereby the openings in the pisr ton walls `are progressively and alternately brought into full registration with the inlet and vdischarge ports'of the respective cylinders.

3; In a pump, the combination with a cylinder and a piston to reciprocate therein, said cylinder heilig provided with inlet and discharge ports, ports connected to the respective ports of the cylinder, Iand means forA effecting an air-tight connection between said pipes and the ports,.said means including arcuate saddle plates yieldingly movable in the cylinder ports for tri'ctional engagement with the periphery of the piston, flexible packing rings secured to said saddle plates and extending upon the outer wall of the cvlinder, `and means to secure the packing rings to the cylinde1"wall.

4. In a pump, the combination with a cylinder and a piston to reciprocate therein,

said cylinder being provided with inlet and discharge ports4 and a piston having an opening to register with said ports, inlet and discharge pipes connected to the respec-v tive ports of the cylinder, and means forni()l effecting a'n air-tight connection between said pipes and the cylinder ports including spring held saddle plates friotionally engaging the peripheryof the piston and provided With openings to register with the 7.5

opening in the piston.

5. In a pump, the combination with a cylinder and aphollow piston" to reciprocate therein, said cylinder having inlet and discharge ports, said piston being provided with an opening 1n its annular wall, of inlet and discharge pipes, and means for effecting anI air-tight connection between said pipes andthe cylinder ports, said means comprising arcuate saddlel platesl rictionally engaging the periphery of the piston and provided with annular flanges niovabh7 disposed through the ports in the cylinderV wall, and tensionally adjustable springs a1'- ranged in the cylinder -wall and yieldingly holding the saddle'plates in engagement with the piston.

6. The combination with a cylinder and a piston to reciprocate therein, said cylinder havingiinlet and discharge ports, of inlet and discharge pipes and means for'eifecting an air-tight connection between the same and the cylinder ports, said means comprising 'saddle plates of arcuate cross sectional form disposed Within the cylinder and in concentric relation to the wall thereof, said plates having laterally extending annular tianges integrally formed therewith and movable in the cylinder ports, packing rings fixed to said flanges and extending upon the exterior of thecylinder and over the edges of said ports, coupling rings fon the inlet and discharge pipes rigidly fixed to -the wall of the cylinder and upon said packing rings, and means arranged in the 110 cylinder 'wall and `engaging said saddle plates to force the concave faces of Athe plates into close frictional engagement with the periphery of the piston.

7. The combination with a cylinder and a piston to reciprocate therein, said piston having inlet and discharge ports, of `inlet and discharge pipes and means for effecting an air-tight connection between each ot the pipes and the respective ports of the cylin- 12o der, said means including a saddle plate arranged within the cylinder and having an annular flange movable in the port thereo, a pipe coupling` ring rigidly fixed to the cylinder wall, said wall beingprovided with openings therein upon opposite sides of the port, springs arranged in said openings bearing against the saddle plate to yieldingly hold the same in close frictional engagement with the periphery of the cylinder, and means arranged in the -fcoupling :ring to adjust creased diameter whereby an annular space :the periphery of the Y M I Copies o1' this patent may be obtained for live cents each, by addressing a -piston of said cylinder -being of increased internal diameter to provide a space between the wall thereofland the periphery of the piston, said cylinder having inlet and discharge ports, of inlet-and discharge pipes and means for eliiecting an air-tightconnection between the same and the cylinder ports including sad- 'dle plates movable in the ports of inder and -having concave faces. to ally engage vthe periphery of l the packing rings said saddle plates, means securing the outer edgeportions of the rings to lof the cylinder y their'intermediate portions inthe movement of 'the saddle plates, and springs mounted in the vcylinder 'wall and plates to yieldingly hold the same in engagement with the piston.

In testimony whereof I hereunto aiix m signature in the the tension of said spings. he combination with a cylinder and to reciprocate therein, the bore of said cylinder at its l is provided between the cylinder wall and piston, said cylinder having lnlet'and discharge ports, of inlet and'discharge pipes and means for effecting an "fair-tight connection between the same and the cylinder ports, said means includin l saddle plates of arcuate cross sectional form isposed in lthe enlarged lower'e'ndcl:l the cylinder and in concentric relation to the wall thereof, packing rings secured to said frictionpiston,

e same against and 1n frictional engagement with the periphery of the piston.

9. e combination withsa cylinder and a piston to reciprocate therein, the .lower end presence of two witnesses. GEORGE J. DOURTE. Witnesses:

D. W. OLDFA'IHER, OAKLEY.

the Commissioner o Eatents,

the cylfixed atv their inner edges to' the cuter face wall, said rings flexingat engaging said saddle i 

